Selecting specific items in a map - terraform

Question

Terraform Version 0.14
I have a JSON file that has multiple objects. I get that file using the local_file data source.
data "local_file" "getJson" {
filename = "${path.module}/sampleObject.json"
}
sampleObject.json:
{
"config":[
{
"id":1,
"type":"typeA",
"vm_name":"Linux1"
},
{
"id":2,
"type":"typeB",
"vm_name":"Windows1"
},
{
"id":3,
"type":"typeB",
"vm_name":"Windows2"
}
]
}
I use a local variable to save and convert the contents of my JSON file to a usable Terraform objects with the jsondecode function. I believe the jsondecode function is converting my JSON object to a map ( I could be wrong). One of the attributes of my JSON object(s) is type. There are two possible values for type (typeA & typeB). I need a way to select all the objects in my JSON object that match a specific type (ie: type == "typeA"). The roadblock for me has been making sure the new collection is either a map or another collection that can be converted to a map using the tomap() function.
My sample code below does exactly what I need it to do using a for loop except... it saves it as a Tuple. In the For loop documentation, there is alternative to save it to an object using {} but I haven't been able to figure out how that works in my given example.
I've reached a point where I think I'm going about the problem wrong with using a for loop. I could use some advise on this. I also think If I can get the for loop to work using {} so the results are saved as an object, I should be able to convert that object to a map using the tomap() function without any issues.
I'm still new to Terraform and any guidance would be appreciated.
For loop reference
locals {
typeA = [ for x in jsondecode(data.local_file.getJson.content).config : x if x.type == "typeA" ]
typeB = [for x in jsondecode(data.local_file.getJson.content).config : x if x.type == "typeB"]
}
This is a redacted sample of how I would use the results.
module "typeABuilder" {
for_each = local.typeA
vm_name = each.value.vm_name
// Assign each attribute from the typeA objects
// ...
// ...
}
module "typeBBuilder" {
for_each = local.typeB
vm_name = each.value.vm_name
// Assign each attribute from the typeB objects
// ...
// ...
}